Improvement in balances



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WOODBURY STORER. HOVUOF CINCINNATI, HIO.

Letters Patent No. 106,163, dated Aug/ust 9, 1870.

IMPROVEMENT IN BALANCES.

The Schedule referred to in these Letters Patent and making part of thevlame.

Nature and Objects of the Invention.

My invention belongs to the class of weighing devices, such assteelyards and modifications ot' the Roman balance or scales, in whichamovable counterpoise or poise-weight, or both of' these, aresubstituted for the piece-weights ofthc 'pairof scales or equal balance.

against a movable connterpoisc on the long arm, in

my device the article is placed at the remote part of aproperly-graduated long arm, and the weight ascertained by a movablepoise-weight ranging the long arm toward the fnlcrum, the effect of'such operation being a virtual substitution for the poise-weight of aload having a long leverage against a cmnmon constant counterpoise witha short leverage.

General Description with Reference In the Drawing.

The drawing is a perspective view oi' one form of my invention, in whichis shown an unequal balance, having a long arm, A, and a short arm, A',with the fixed f'ulcrum B resting on the support G, which is adjusted toand n'laintained in a vertical position by the set-screw legs J J J, theplumb-bob K, thc plumbline L, and the tixed pin 7c.

The long arm, A, and its dependencies are counterpoised by the constantcounterpoise y, and the adjustable constant counter-poise G, with itsscrew H.

The vibration of the bea-m A A' is limited by the arms oi' the stop M,and the degree of vibration is shown by the index I over the graduatedare N.

'Ihe scale-pan D, having its center of gravity below the long arm A, isfreely suspended trom the knifeedge or pivot E, and the long arm A ismarked with counter-numbered equal graduations, l1 to b, over which themovable poise-weight r' ranges toward the fulcruln 1%.

In the construction ot"my balance the constant counterpoise orcounterpoises may be fixed, or movable, or` adjustable on the short armA', in any form that c will serve to counterpoise the long arm A and itsdependencies, C D E. The form of unequal balance shown is not preferred,but is convenient.

Tile whole beam A A' or the lonW arm A mav be e v a l made to` combinelightness with bulk and rigidity by taking a strip ot sheet metal, cutto the right length and about twice the required width, marking it bymeans of a graduating engine, such as is used in making rules formeasurement, stamping the figures so as to be read 0n bot-h' sides of acenterline, and then binding or folding the strip lengthwise, so that across- `section will resemble an inverted U or V.

. The graduations l) to b may be in lineswith or without notches, in anynumber or degree of separation, the poise-weight c being subsequentlyadapted to them, and made citherto slide or hang, as may be preferred.

'lhc following are some of the'advantages obtained by my invention:

My balance has a prepoiulerating power by the operation ot' the loadupon the long arm, so that a given variation from the true weight heiligthus rendered more visible, a proportionate accuracy is obtainable.

Anothe advantage is simplicity ol' construction in comparison with thecommon equal balance, which latter is known to require great care andskill in equalizing the parts and in adjusting the t'ulcruln exact-lymidway from two pivots for the support of two sealepans, and similarcare and exaetness are requisite in various forms of unequal balances,but in making 'my balance the fulerum B may at once be fixed near thecounterpoise, the pivot E made fast at the end ofthe graduated long armA, the scale-pan suspended, and then the poise-weight c be increased ordiminished in weight until, from equilibrium at zero, b, it can be movedto the limit ot' its range, at b', and record the proper number ofweights then indicated, as required in I), to restore equilibrium. Theintermediate weights and their fractions are included in the oneadjustment, and sure to bel-ight it' the graduations are equal and thestandard weight a true one.

The capacity or weighing power may be increased by counterpoisc-weigl1tsadded` to the short arm, either directly upon the arm or suspended fromit.

Claim.

I claim as my inventionrlhe combination ot" the i'eely-suspemledscale-pan D, the pivot E, the counter-ninnbered equal graduations b tob', and the movable poise-weight c, with the long arm A of an unequalbalance or scales, substantially as and for the purposes hereinbeforeset forth.

In testimony of which invention I hereunto set my hand.

WOODBURY STORER HOW. Vvitnesses GEO. H. KNIGHT, JAMES H. Lunas.

